setpci

setpci

NAME SYNOPSIS DESCRIPTION OPTIONS DEVICE SELECTION OPERATIONS REGISTER NAMES PCILIB OPTIONS EXAMPLES SEE ALSO AUTHOR

NAME

setpci - configure PCI devices

SYNOPSIS

setpci [__options__? devices operations...

DESCRIPTION

setpci is a utility for querying and configuring PCI devices.

To make use of all the features of this program, you need to have Linux kernel 2.1.82 or newer which supports the /proc/bus/pci interface. With older kernels, the PCI utilities have to use direct hardware access which is available only to root and it suffers from numerous race conditions and other problems.

All numbers are entered in hexadecimal notation.

OPTIONS

-v

Tells setpci to be verbose and display detailed information about configuration space accesses.

-f

Tells setpci not to complain when there's nothing to do (when no devices are selected). This option is intended for use in widely-distributed configuration scripts where it's uncertain whether the device in question is present in the machine or not.

-D

`Demo mode' -- simulate configuration space accesses instead of really doing them. It's useful to try setpci -vD to see what your complex sequence of setpci operations does before you actually execute it.

--version

Shows setpci version. This option should be used standalone.

DEVICE SELECTION

Before each sequence of operations you need to select which devices you wish that operation to affect.

-s [[[[

Select devices in specified bus, slot and function. Each component of the device address can be omitted or set as

-d [[

Select devices with specified vendor and device ID. Both ID's are given in hexadecimal and may be omitted or given as

OPERATIONS

To query value of a configuration register, just name it (either by typing its name or by typing register address with optional .B, .W or .L suffix specifying register width as byte, word or longword).

To set a register, write reg=values where reg is the same you would use to query the register and values is a comma-separated list of values you want to write starting with the given address.

REGISTER NAMES

setpci knows the following configuration register names. See PCI bus specs for their precise meaning or consult /usr/include/linux/pci.h for few comments.

VENDOR_ID DEVICE_ID COMMAND STATUS REVISION CLASS_PROG CLASS_DEVICE CACHE_LINE_SIZE LATENCY_TIMER HEADER_TYPE BIST BASE_ADDRESS_0 BASE_ADDRESS_1 BASE_ADDRESS_2 BASE_ADDRESS_3 BASE_ADDRESS_4 BASE_ADDRESS_5 CARDBUS_CIS SUBSYSTEM_VENDOR_ID SUBSYSTEM_ID ROM_ADDRESS INTERRUPT_LINE INTERRUPT_PIN MIN_GNT MAX_LAT PRIMARY_BUS SECONDARY_BUS SUBORDINATE_BUS SEC_LATENCY_TIMER IO_BASE IO_LIMIT SEC_STATUS MEMORY_BASE MEMORY_LIMIT PREF_MEMORY_BASE PREF_MEMORY_LIMIT PREF_BASE_UPPER32 PREF_LIMIT_UPPER32 IO_BASE_UPPER16 IO_LIMIT_UPPER16 BRIDGE_ROM_ADDRESS BRIDGE_CONTROL CB_CARDBUS_BASE CB_CAPABILITIES CB_SEC_STATUS CB_BUS_NUMBER CB_CARDBUS_NUMBER CB_SUBORDINATE_BUS CB_CARDBUS_LATENCY CB_MEMORY_BASE_0 CB_MEMORY_LIMIT_0 CB_MEMORY_BASE_1 CB_MEMORY_LIMIT_1 CB_IO_BASE_0 CB_IO_BASE_0_HI CB_IO_LIMIT_0 CB_IO_LIMIT_0_HI CB_IO_BASE_1 CB_IO_BASE_1_HI CB_IO_LIMIT_1 CB_IO_LIMIT_1_HI CB_SUBSYSTEM_VENDOR_ID CB_SUBSYSTEM_ID CB_LEGACY_MODE_BASE

PCILIB OPTIONS

The PCI utilities use PCILIB (a portable library providing platform-independent functions for PCI configuration space access) to talk to the PCI cards. The following options control parameters of the library, especially what access method it uses. By default, PCILIB uses the first available access method and displays no debugging messages. Each switch is accompanied by a list of hardware/software configurations it's supported in.

-P

Use Linux 2.1 style configuration access to directory instead of /proc/bus/pci. (Linux 2.1 or newer only)

-H1

Use direct hardware access via Intel configuration mechanism 1. (i386 and compatible only)

-H2

Use direct hardware access via Intel configuration mechanism 2. Warning: This method is able to address only first 16 devices on any bus and it seems to be very unrealiable in many cases. (i386 and compatible only)

-S

Use PCI access syscalls. (Linux on Alpha and !UltraSparc? only)

-F

Extract all information from given file containing output of lspci -x. This is very useful for analysis of user-supplied bug reports, because you can display the hardware configuration in any way you want without disturbing the user with requests for more dumps. (All systems)

-G

Increase debug level of the library. (All systems)

EXAMPLES

`setpci -d : latency_timer=40' sets the latency timer to 64 (40 hexadecimal).

`setpci -s 0 device_id vendor_id' lists ID's of devices in slot 0 in all busses.

`setpci -s 12:3.4 3c.l=1,2,3' writes longword 1 to register 3c, 2 to register 3d and 3 to register 3e of device at bus 12, slot 3, function 4.

SEE ALSO

lspci(8)

AUTHOR

The Linux PCI Utilities are maintained by Martin Mares